South Africa nuclear weapons dismantled arsenal

6 devices

South Africa built a secret nuclear arsenal

South Africa was the only African country to develop nuclear weapons. It secretly assembled six working devices between 1980 and 1990, then voluntarily dismantled its arsenal in 1991, becoming the first country to give up its nuclear capability.

The eye adapts across a huge range of brightness

100-trillion-fold

By adapting to changing light, the human eye can work across brightness levels spanning roughly 100 trillion times from dim to bright. At any one moment, however, the range it can handle is much smaller.

One failed escape made France's king look like an enemy within

In 1791, Louis XVI tried to flee France but was caught at Varennes. The failed escape convinced many people that the king was looking for outside help against the Revolution. Trust in a monarchy limited by a constitution weakened, and demands for loyalty and preparations for war grew.

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South Africa nuclear weapons dismantled arsenal

South Africa built a secret nuclear arsenal

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